diff options
| author | Jay Agarwal <jagarwal@nvidia.com> | 2012-03-09 17:51:02 +0530 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2012-03-22 03:53:15 -0700 |
| commit | f8de79d91f59794f07797672998897e6576b9161 (patch) | |
| tree | 74be680ecad535357507f3bcd1365cc8d984fcf0 /arch/arm | |
| parent | 9ebd05d7fc5212ffc162296ba1ec194001211538 (diff) | |
tegra:pcie: Correct pcie check link sequence
1. Removed mdelay in reset code since pci devices
are not detected with this.
2. Moved the reset logic down in retry label.
Bug 637871
Change-Id: Idd6344860e513407d5f8c8ba05e1beef0f39bf57
Signed-off-by: Jay Agarwal <jagarwal@nvidia.com>
Reviewed-on: http://git-master/r/89128
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Allen Martin <amartin@nvidia.com>
Reviewed-by: Winnie Hsu <whsu@nvidia.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-tegra/pcie.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c index 462142f88072..6a424365f42a 100644 --- a/arch/arm/mach-tegra/pcie.c +++ b/arch/arm/mach-tegra/pcie.c @@ -1040,13 +1040,6 @@ static bool tegra_pcie_check_link(struct tegra_pcie_port *pp, int idx, int timeout; do { - /* Pulse the PEX reset */ - reg = afi_readl(reset_reg) & ~AFI_PEX_CTRL_RST; - afi_writel(reg, reset_reg); - mdelay(1); - reg = afi_readl(reset_reg) | AFI_PEX_CTRL_RST; - afi_writel(reg, reset_reg); - timeout = TEGRA_PCIE_LINKUP_TIMEOUT; while (timeout) { reg = readl(pp->base + RP_VEND_XP); @@ -1075,6 +1068,12 @@ static bool tegra_pcie_check_link(struct tegra_pcie_port *pp, int idx, } retry: + /* Pulse the PEX reset */ + reg = afi_readl(reset_reg) & ~AFI_PEX_CTRL_RST; + afi_writel(reg, reset_reg); + reg = afi_readl(reset_reg) | AFI_PEX_CTRL_RST; + afi_writel(reg, reset_reg); + retries--; } while (retries); |